PAT 99 course participants at the Site Museum of Chan Chan,
Peru, review construction techniques for earthen architecture.
Chan Chan was an earthen city constructed and occupied by
the Chimu people between the 10th and 15th centuries. Photo:
Hugo Houben.

Wall supports stabilize the remains of adobe barrack walls
at historic Fort Selden in New Mexico. This 19th-century fort—abandoned
by the U.S. Army in 1891—has been the site of earthen architecture
preservation research by the Museum of New Mexico State Monuments,
research in which the GCI has participated. Photo: Erica Avrami.

East face of the Triple Arched Gate at Tel Dan in Israel.
This 3,700-year-old mud brick gate is one of the earliest
known examples of an arched structure. The GCI undertook extensive
documentation of the site as part of a project with the Israel
Antiquities Authority. Photo: Erica Avrami.